__STDC__ and non-conforming ANSI C compilers

[Doug Gwyn]

In article <944 at ubu.warwick.UUCP> geoff at emerald.UUCP (Geoff Rimmer) writes:
-#ifdef __STDC__
-#if __STDC__==0
-#undef __STDC__
-#endif
-#endif

I have no guarantee that the implementation will allow my program
to #undef __STDC__.  I suspect that some won't.